package com.jgp.filter;

import com.alibaba.fastjson.JSON;
import com.jgp.common.BaseContext;
import com.jgp.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@Slf4j
@WebFilter(filterName = "loginCheckFliter",urlPatterns = "/*")
public class LoginCheckFliter implements Filter {
//    路径匹配器，支持通配符
    public static final AntPathMatcher PATH_MATCHER=new AntPathMatcher();
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain chain) throws IOException, ServletException {
        HttpServletRequest request =(HttpServletRequest) servletRequest;
        HttpServletResponse response =(HttpServletResponse) servletResponse;
        //    过滤器具体的处理逻辑如下:1、获取本次请求的URI
        String requestURI=request.getRequestURI();
        log.info("拦截到请求：{}",requestURI);

        //        定义不需要处理的请求
        String urls[]=new String[]{
                "/employee/login",
                "/employee/logout",
                "/backend/**",
                "/front/**",
                "/common/**",
                "/user/sendMsg",
                "/user/login"
        };
//2、判断本次请求是否需要处理
        boolean check=check(urls,requestURI);
// 3、如果不需要处理，则直接放行
        if(check==true){
            log.info("本次请求不需要处理：{}",requestURI);
            chain.doFilter(request,response);
            return;
        }
//4、判断登录状态，如果已登录，则直接放行5、如果未登录则返回未登录结果
        if(request.getSession().getAttribute("employee")!=null){
            log.info("用户一登陆：{}",request.getSession().getAttribute("emoloyee"));


            Long empid=(Long)request.getSession().getAttribute("employee");
            BaseContext.setCurrentId(empid);



            long id =Thread.currentThread().getId();
            log.info("线程id为：{}",id);
            chain.doFilter(request,response);
            return;
        }
        if(request.getSession().getAttribute("user")!=null){
            log.info("用户一登陆：{}",request.getSession().getAttribute("user"));


            Long empid=(Long)request.getSession().getAttribute("user");
            BaseContext.setCurrentId(empid);



            long id =Thread.currentThread().getId();
            log.info("线程id为：{}",id);
            chain.doFilter(request,response);
            return;
        }
//        如果未登录，返回未登录结果，通过输出流的方式向客户端页面响应数据
        log.info("用户未登录");
        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));
        return;
}
/**
 *路径匹配，检查本次是否需要放行
 */
public boolean check (String urls[],String requestURI){
    for (String url : urls) {
        boolean match = PATH_MATCHER.match(url, requestURI);
        if(match==true)
                return true;
    }
    return false;

}
}
